[Warning: The below contains Major spoilers for Abbott Elementary, Season 4 Episode 9, “Volunteers.”] It’s Always Sunny in Philadelphia finally met Abbott Elementary‘s faculty in the first half of a monumental TV event as the gang from Paddy’s Pub dropped in as volunteers at the titular school in the aptly named episode. In “Volunteers,” while the school’s principal Ava (Janelle James) promises she’s getting the teachers some much-needed extra help in the classroom, she doesn’t exactly reveal how. It turns out that the Always Sunny crew was in need of fulfilling some court-ordered volunteer hours, making them prime — but not perfect — candidates for the gig. Every character is paired with another character from the opposite show, except for Dennis (Glenn Howerton), who refuses to be filmed by Ava’s camera crew. But for some characters, the alarm bells are raised upon meeting this rag-tag team of volunteers. While Melissa (Lisa Ann Walter) initially thinks she knows ...